<div class="example-wrapper">
    <div style="margin-bottom: 5px;">
        <button onclick="onBtShowLoading()">Show Loading Overlay</button>
        <button onclick="onBtShowNoRows()">Show No Rows Overlay</button>
        <button onclick="onBtHide()">Hide Overlay</button>
    </div> 
    <div id="myGrid" class="ag-theme-quartz"></div>
</div>